Improvement in cut-nail machines



J. W. CHEWNING, Jr'.

' Gut-Nail Machine.

N0.199,791. Patented Jan. 29,1878.

J kn 7/6 7 l 7 Q G UNITED/smiles PATENT OFFICE.

JOHN w. QHEWNING, JR, on SHADWELL DEPOT, VIRGINIA, Assrenoe or ONEHALF HIS RIGHT To JAMES ROWLAND AND NATHAN ROWLAND, or PHILADELPHIA, PENNSYLVANIA. q 1

IMPROVEMENT, m our- AIL FMACHINEVS.

' Specification forming 4m of Letters Patent M19939 1, dated January29, 1878 application filed October l6,1877: I

To all whom it may concern: l 5

Be it known that I, J OHN W. GHEWNING, J r., of Shadwell Depot, Albemarle county, Virginia, have invented a new and useful Improvement in Nail-Machines, of which the following is a specification:

My invention relates to certain improvements in machines for the manufacture of cutnails, the main object of my improvements being simplicity in the construction and operation of the devices for cutting and heading the blank and for turning the nail-plate.

. In the accompanying drawings, Figure 1 is a side view of my improved nail-m achine Fig. 2, a transverse vertical section of the same; and Figs. 3, 4., 5, and 6, detached views of parts of the machine drawn to an enlarged scale.

A A represent the opposite side frames of the machine, inwhich are-formed bearings for the driving-shaft a, which carries a toothed segment, I), and two cams, d and e. The cam 01 is embraced by a yoke, 13, which forms the end of an arm, D, pivoted to one of thev side fi'ames at c, and having a pin, f, to which are connected the upper end of a link, g, and that of a rod, h. The link 9 is connected at its lower endto the upper end of aplate, E, adapted to vertical guides on the side frame A, and reduced in thickness at the lower end, so as to form a cutting-knife, i, which, in conjunction with the fixed die F, Fig. 3, serves to sever anail-blank from a flat plate of metal, as described hereinafter. "The die F consists of a plain block of steel, formed preferably with beveled edges, and adapted to a'recess of corresponding shape in the side frame A, the block being merely slipped into place laterally from the side of the machine, so that it can be readily removed for repairs. The lower end of the rod his connected to the long arm of a lever, G, hung to the side frame A at m, the short arm carrying on its upper edge an adjustable gage, J, arranged adjacent to the die F and cutting-knife 13, Figs. 3 and 4.. The heading-die n is adapted to a guide on the side frame A, a spring, 19, tending to maintain this die in the retracted position shown in Fig. 1, its forward movement at the properintervals being effected by the an e on' 1.]... driving -shaft throughthe medium of the lever M.

As in other machines of the class to which my invention relates, the edges of the fixed die F and gage J are inclined in respect to each other, as shown in Fig. 5, so that the nailblank, when severed from the plate, shall have the desired taper. This necessitates the turning of the nail-plate completely over after each operation of the cutting-die, in order that its out edge, when it is again fed forward, shall conform to the angle of the gage J. In order to effect this operation, the nail-plates w are arranged to slide in acentral longitudinal opening, 2, of a tube, T, to which is secured a cogwheel, 8, operated intermittingly by the toothed segment I) on the driving-shaft a, the extent of the movement imparted to the cog-wheel being sufficient to cause a half-revolution of the tube, and consequent complete overturn of the nail-plate w. The tube T is carried by a box, U, adapted to a standard, U, so that it can move vertically therein, in order to allow the tube to rise as the plate as is turned over on the flat surface of the die F. The central opening z'of thetube is provided with liningplates, adjustable by means of set-screws 2, so as to adapt the tube for the reception of nailplates of different sizes. The tube T is of such a length that it will contain severalnail-plates, which are fed through the same by the pressure upon the end of the rear plate of a block, t, on the end of the rod to connected to a lever, W, against which pressure is exerted by a spring or weight. The block -t is so hung to the end of the rod w that it is free to turn on the said rod with the plates w and tube T. The rear portion of the tube T is cut away, as best observed in Fig. 6, so as to form a flat shelf, '0, on which, after drawing back the lever W, a nail-plate may be laid, either by hand or by automatic devices, prior to being fed thro ugh the tube.

The'operation of the machine is as follows: Supposing the nail-plateau to be in the position' shown in Fig. 3, the cutting-knife z first descends and severs the blank from the end of the plate, the lever G meanwhile rising, so

that themblank shallzbe clamped vertically between the said lever Gr and the knife, while it s confined laterally between the gage-plate J and the edge of the die F. (See Fig. 4.) While the blank is thus securely held the die an advanees, forms the head, and is retracted, s0 that when the cutting-knife is elevated, and

the lever G. .descends, the nail is at liberty to escape. Meanwhile the nail-plate has been turned, and as soon as the knife i rises above the top of the die E the plate is fed forward until its out edge comes in contact with the gage-plate J, when the parts are again in the position shown in Fig. 3, and the above operations are repeated.

It will be observed that the above machine.

has but few parts, and that these are of a simple character, while the parts most liable'to accident or derangementnamely, the cuttingknife '5, gage J, and heading-die n-are-all upon the outside of the machine, so that ready access may be'hadto the same, and the removal of any of them, when necessary, accomplished without diflioulty.

I claim as my invention- 1. The combination of the fixed die F, the

header 1, the lever G and its gage J, and the 

